火卫一
火卫一又称为“福波斯”（英语：Phobos；希腊语：Φόβος；系统名称：Mars I），是火星个两颗自然卫星中，距离火星较近且较大个一颗，平均半径为11.1km，是另一颗卫星火卫二个7.24倍。火卫一个名字是福波斯（意思是害怕），是希腊神话中个战神阿瑞斯（在罗马神话中名叫玛尔斯）个儿子。
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